runner.conda: Bump Micromamba from 1.1.0 → 1.5.8

Newer version includes Zstandard support (since 1.2.0).

Resolves: <#366>
Co-authored-by: Thomas Sibley <tsibley@fredhutch.org>

CHANGES.md

@@ -13,6 +13,14 @@ development source code and as such may not be routinely kept up to date.
 
 # __NEXT__
 
+## Improvements
+
+- The Conda runtime now uses Micromamba 1.5.8 (upgraded from 1.1.0) to manage
+  the runtime environment. The newer version supports Zstandard-compressed
+  index files which speeds up `nextstrain setup` and `nextstrain update` for
+  the Conda runtime.
+  ([#367](https://github.com/nextstrain/cli/pull/367))
+
 
 # 8.3.0 (30 April 2024)
 

nextstrain/cli/runner/conda.py

@@ -67,7 +67,7 @@
     <https://anaconda.org/conda-forge/micromamba/>`__, or the special string
     ``latest``.
 
-    Defaults to ``1.1.0``.
+    Defaults to ``1.5.8``.
 """
 
 import json
@@ -100,7 +100,7 @@
 
 # If you update the version pin below, please update the docstring above too.
 MICROMAMBA_VERSION = os.environ.get("NEXTSTRAIN_CONDA_MICROMAMBA_VERSION") \
-                  or "1.1.0"
+                  or "1.5.8"
 
 NEXTSTRAIN_CHANNEL = os.environ.get("NEXTSTRAIN_CONDA_CHANNEL") \
                   or "nextstrain"